I have a new item that my brother and I are making available. We call it 'Steel Powder'. It is indeed a powdered steel that we mix with epoxy. Very dense, very heavy. Cheaper and easier to use than led. It can be molded, pained on, poured into, anywhere you would use epoxy. Great for using behind firewalls, in cowls, nose cones, and the like. It will not come loose, and doubles to strengthen anything is is applies to. Very easy to mix with 15min epoxy and pour in.

Lead is now considered a hazardous material (DO NOT INHALE FUMES FROM MELTING IT) and will be less available as time goes on. Some states are banning it's use even now.

PM me if you would like more information. Here is a picture of it in my Meister cowl.